Nemuri Kayama (香か山やま睡ねむり, Kayama Nemuri?), also known as the R-Rated Hero: Midnight (18禁ヒーロー ミッドナイト, Jū-hachi-kin Hīrō Middonaito?) | Nemuri was a very playful and flirtatious person with an unpredictably serious and temperamental side to her. She got angry whenever someone interrupted her or insulted her. Nemuri had no shame and appeared to act on whims most of the time. Despite her flirtatious personality, Nemuri was intelligent, perceptive, and articulate.